Setup Zoom Websockets

# /setup-zoom-websockets

Background reference for persistent Zoom event streams. Prefer workflow routing first, then use this file when WebSockets are plausibly better than webhooks.

## WebSockets vs Webhooks

| Aspect | WebSockets | Webhooks | |--------|------------|----------| | **Connection** | Persistent, bidirectional | One-time HTTP POST | | **Latency** | Lower (no HTTP overhead) | Higher (new connection per event) | | **Security** | Direct connection, no exposed endpoint | Requires endpoint validation, IP whitelisting | | **Model** | Pull (you connect to Zoom) | Push (Zoom connects to you) | | **State** | Stateful (maintains connection) | Stateless (each event independent) | | **Setup** | More complex (access token, connection) | Simpler (just endpoint URL) |

**Choose WebSockets when:** - Real-time, low-latency updates are critical - Security is paramount (banking, healthcare, finance) - You don't want to expose a public endpoint - You need bidirectional communication

**Choose Webhooks when:** - Simpler setup is preferred - Small number of event notifications - Existing HTTP infrastructure

## Prerequisites

- Server-to-Server OAuth app in [Zoom Marketplace](https://marketplace.zoom.us/) - Account ID, Client ID, and Client Secret - WebSocket subscription with events enabled

> **Need help with S2S OAuth?** See the **[zoom-oauth](../oauth/SKILL.md)** skill for complete authentication flows.

> **Start troubleshooting fast:** Use the **[5-Minute Runbook](RUNBOOK.md)** before deep debugging.

## Quick Start

### 1. Create Server-to-Server OAuth App

1. Go to [Zoom Marketplace](https://marketplace.zoom.us/develop/create) 2. Create a **Server-to-Server OAuth** app 3. Copy Account ID, Client ID, Client Secret

### 2. Enable WebSocket Subscription

1. In your app, go to **Feature** → **Event Subscriptions** 2. Add an Event Subscription 3. Select **WebSockets** as the method type 4. Select events to subscribe to (e.g., `meeting.created`, `meeting.started`) 5. Save - an endpoint URL will be generated

### 3. Connect via WebSocket

```javascript const WebSocket = require('ws'); const axios = require('axios');

// Step 1: Get access token async function getAccessToken() { const credentials = Buffer.from(`${CLIENT_ID}:${CLIENT_SECRET}`).toString('base64'); const response = await axios.post( 'https://zoom.us/oauth/token', new URLSearchParams({ grant_type: 'account_credentials', account_id: ACCOUNT_ID }), { headers: { 'Authorization': `Basic ${credentials}`, 'Content-Type': 'application/x-www-form-urlencoded' } } ); return response.data.access_token; }

// Step 2: Connect to WebSocket async function connectWebSocket() { const accessToken = await getAccessToken(); // WebSocket URL from your subscription settings const wsUrl = `wss://ws.zoom.us/ws?subscriptionId=${SUBSCRIPTION_ID}&access_token=${accessToken}`; const ws = new WebSocket(wsUrl); ws.on('open', () => { console.log('WebSocket connection established'); }); ws.on('message', (data) => { const event = JSON.parse(data); console.log('Event received:', event.event); // Handle different event types switch (event.event) { case 'meeting.started': console.log(`Meeting started: ${event.payload.object.topic}`); break; case 'meeting.ended': console.log(`Meeting ended: ${event.payload.object.uuid}`); break; case 'meeting.participant_joined': console.log(`Participant joined: ${event.payload.object.participant.user_name}`); break; } }); ws.on('close', (code, reason) => { console.log(`Connection closed: ${code} - ${reason}`); // Implement reconnection logic }); ws.on('error', (error) => { console.error('WebSocket error:', error); }); return ws; }

connectWebSocket(); ```

## Event Format

Events received via WebSocket have the same format as webhook events:

```json { "event": "meeting.started", "event_ts": 1706123456789, "payload": { "account_id": "abcD3ojkdbjfg", "object": { "id": 1234567890, "uuid": "abcdefgh-1234-5678-abcd-1234567890ab", "host_id": "xyz789", "topic": "Team Standup", "type": 2, "start_time": "2024-01-25T10:00:00Z", "timezone": "America/Los_Angeles" } } } ```

## Common Events

| Event | Description | |-------|-------------| | `meeting.created` | Meeting scheduled | | `meeting.updated` | Meeting settings changed | | `meeting.deleted` | Meeting deleted | | `meeting.started` | Meeting begins | | `meeting.ended` | Meeting ends | | `meeting.participant_joined` | Participant joins meeting | | `meeting.participant_left` | Participant leaves meeting | | `recording.completed` | Cloud recording ready | | `user.created` | New user added | | `user.updated` | User details changed |

## Connection Management

### Keep-Alive

WebSocket connections require periodic heartbeats. Zo